Elisya, author
2017
UI - Makalah dan Kertas Kerja
Korea Information Service Inc., 1976
Buku Teks
Ray, Sibnarayan
Melbourne and Sydney : Thomas Nelson (Austrakia) Ltd., 1966.
Buku Teks
East, Roger, author
Routledge, 2006
Buku Referensi
McCleary, John
Cambridge University Press, 1994
Buku Teks